Valve.



F. N. OONNET & A. W. GRAHAM. VALVE.

APPLICATION FILED NOV. 21, 1907.

9%,1 6, Patented Dec. 2 8, 1909.

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FREDERICK N. CONNET AND ARTHUR W. GRAHAM, OF PROVIDENCE, RHODE ISLAND, ASSIGNORS TO BUILDERS IRON FOUNDRY, OF PROVIDENCE} RHODE ISLAND, A

CORPORATION 'OF RHODE ISLAND.

VALVE.

Application filed November 21, 1907.

Tout! IQ/L077? it may concern:

Be it known that we. FREDERICK .Y. (,oxi vn'r and Alrrnvn \l'. (iRAUAH, citizens of the United States, residing at the city of Providence, in the county of Providence and State of Rhode Island, have invented certain new .and useful Improvements in Valves, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to valves and has for its object to provide a valve that is adapted to open and close automatically, the same being arranged so as to require more power or pressure to open it than is required to hold it open after the same is in its open position.

The essential feature of the device is that.

the valve, on account of the action of its cont-rotlling weight, due to the angle of thrust causes the same to remain closed until the pressure has risen to an amount sufiicient to open the same, after which this angle of thrust is changed decreasing the effective action of the Weight and allowing the valve to remain open until the pressure has been considerably reduced below the amount required to open it thus the valve is effectually prevented from continually opening and closing as is the case with the ordinary check valve. v

This valve may be used for any purpose for which it is adaptedybu t is more particularly designed to be used for controlling the direction of liquids through a com pound meter whereby when the liquid acquires a certain velocity the valve automatically opens to allow the. liquid to pass therethrough, but when the flow falls below a predetermined rate the valve closes automatically and causes the flow to pass around through a second or smaller'meter.

In the operation of this valve, in the particular case pointed out, it will be seen to be very essential that the valve should not be allowed to open and close at each slight variation in the pressure but should remain closed until the pressure is sufficient to open it, after which it will remain open until the pressure has fallen considerably below the amount required to open it;

\Vith these and other objects in View, theinvention consists of certain novel features of construction as will be more fully de-' Specification of Letters Patent! I Patented Dec 28, flfiflgh,

Serial No. 403,135.

scribed and particularly pointed out in the appended claims. I

In the accon'ipanymg drawings: Figure 1 1s a sectional side elevation of the valve casing showing the mechanism containedtherein, showing a powerful toggle joint arranged with a variablehveight suspended over said joint. Fig. 2- shows a single weight pivoted to therasing and connected by aylink to the valve, the manner of pivoting the weight itself forming one of the linking members. Fig. 3 is another form of toggle jointed valve showing the weight adjustably mounted to slide on one arm of the closing lever. Fig. 4-- is a longitudinal slidable cam adapted to be operated by a weight through a contact roll. Fig. an endview of the valve showing the bearing wings.

Referring to the drawings 1 is the valve casing which may be made in any suitable form having an inlet opening2 and an outlet opening 3. The cas ng is preferably made with a cap 4 through which the internal mechanism is inserted. A disk valve 5 is adapted to fit over and close the inlet opens ing in the casing where it is seated against the inner edge of sai d opening at 6. i This valve is provided with the wings 7---7 which extend into the inlet opening to guide the valve as ,it slides to and from its seat.

In carrying out our invention \vehave provided a set of links 8 and 9 pivoted together at 10, one end of link S being pivoted at. 1.1 to the valve, while the opposite end of link 5) is pivoted at 12 to the cas ng. The weight 13, in Fig. l, is supported over this joint on the upright spindle ll. which spindle is pivoted at its lower end to the joint at 10 and is also supported and held in its upright position by means of a second link to. Any

required amount of weight 13 may be placed on this splndle 14. In Fig. 2 the portion of the weight 13 bethe guide members 20. A roll 2t mounted 011 1141 upright shaft 22 is pressed dqwnward by the weights 23. When the'valve 1s on its sea-t thisroll engages a very steep portien 10f the-cam at 24, requiring considerable pressin'e to move it, but as the valve is pressed backward from its seat the roll is raised to a less steep-portion of the cani where the effectiveness of the Weight acting to close the valve is greatlyreduced.

' Our invention is not restricted to. the construction-and arrangement of the operating "parts-as herein shown and described, any

construction whereby thepressnre rmi niied to open the'valv'e must-be greater than that required to .hold' the same open, would eonie withinthe spirit and scope of our in- -vention.

' H aving thus described (my invention, What ters Patent, is:

r L'A. check. valve comprising a ens-in u .we claim as new and desire-t0 secure by Letvalve and sent in said cas ng, a Weighted link operntively connected to said valve,

the link being so disposed angulalrly that v "the effective action of said Weight Will be and its opposite end. to said Weight whereby the latter is' adapted to aetas one of the link:

members and exert a differential n'essure on sand valve as the same is being opened ln testimon wvhereofwe ufiixonr'sinatures.

in presence oftwo witnesses;

FREDERICK NQ CONN IGIL' I 

